Clock-subboard clock input status. Options: 1.none(1) - indicates that the clock-subboard has no clock-signal input 2.normal(2) - indicates that the clock-signal input status of the clock-subboard is normal 3.fault(3) - indicates that the clock-signal input status of the clock-subboard is faulty 4.no3rdclksubboard(255) - indicates that there is no 3rd subboard